11 00 039 Checking compression of all cylinders (N12, N14)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: High tension - mortal danger!

Interrupt power supply to ignition coils.

Read and comply with notes on compression pressure check.

Necessary preliminary tasks

IMPORTANT: Then check the Schrader valve that is now visible for secure seating.

Fig 1: Identifying Spark Plug Tip With Special Tool (11 0 222)

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Prepare special tool 11 0 222 in conjunction with 11 8 732 and 11 8 731.

Fig 2: Identifying Special Tools (11 0 222, 11 8 732 And 11 8 731)

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Screw special tool 11 0 222 onto special tool 11 8 731 to 10 Nm.

Fig 3: Identifying Special Tools (11 0 222 And 11 8 731)

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IMPORTANT: Do not forget to oil spark plug thread of special tool 11 8 731.

Screw special tool 11 0 222 by hand into spark plug thread and connect special tool 11 0 224.

Use adapter lead (1) if the compression pressure is being checked with the BMW diagnosis system.

Depress accelerator pedal and actuate starter until compression pressure stops rising.

Fig 4: Identifying Adapter Lead And Special Tools

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Assemble engine

Now clear the fault memory.